7. The restoring force acting on a spring is not proportional to.. a. The change

Question

7. The restoring force acting on a spring is not proportional to.. a. The change of position of the spring from its "natural" position b. The length of the spring c. The "stretch of the spring d. The displacement of the spring from its equilibrium position 8. The coefficient of kinetic friction.... a. is always smaller than the coefficient of static friction b. is always larger than the coefficient of static friction c. is always equal to the coefficient of static friction d. can be larger or smaller than the coefficient of static friction, depending orn the situation.

Explanation / Answer

7)

The restoring force is given by:

F = -kx, where

K is the spring constant

X is the description of options (a, c and d)

Hence the force is not proportional to length of the spring.

Ans: option b

8)

(a) always smaller than the coefficient of static friction.

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